If you saw someone being harassed, would you intervene?

I posted this on my facebook account and unfortunately people weren’t too sympathetic, I understand that people usually don’t want to get involved in fights, but to say nasty things is uncalled for. I don’t care why someone is getting harassed or bullied, it’s wrong and someone should be a good Samaritan, just not me. I don’t think the video shows anything too extreme, but would you walk away if it was one of your own? If you saw a Jewish kid getting harassed on the street would you walk away? This reminds me of the long island railroad stabbing that happened a few years ago while people looked on, but no one intervened.